Coffee urn



Nov. 2U, i923 3,474,858

H, STRQHBACH COFFEE URN Filed Oct.v 2. 1922 2 Sheets-Sheet 2 ML 2i l Z5 30 39 Eulen/X67.

Patenten New. ao, reas. lbfl'ftltl NETE@ STATES PATENT @FFHCCEO HENRY STROHBCH, OF NEW YORK, N. Y.

COFFEE URN.

Application led October a, 1922. Serial No. 591,980.

Zi'o all whom it may concer/1t.' is provided on the inside thereof for su Be it known that lt, HENRY STROHBACH, porting a percolator 4, an extract receptace a citizen of the United States, residing at and protecting oven or casing 17. Said New York, in the county and State of New oven or protecting casing for the earthen- 55 York, have invented certain new and useware extract receptacle 10 is preferably ful improvements in Coffee Urns, of which made of metal and spaced away from said the-following is a full, clear, and exact specireceptacle as shown. Around the upper edge fication. of said oven there is an outwardly extend- This invention relates to coffee urns or ing horizontal flange 19 resting directly 60 10 coEee making machines for use Ain restauupon the ledge 3. rlhe extract receptacle rants, hotels and lunch rooms, and has for 10 has a similar fiange 11 at its upper edge its object to provide a machine of this kind which rests upon the flange 19 of the oven, which is more ecient and durable than and the percolator 4 also has a flange 5 which those heretofore used. rests upon the flange 11 of the extract rec5 l5 A special object is to protect the extract ceptacle, whereby all of said vessels are supreceptacle, whlch is preferably made of ported by said ledge. earthenware, against cracking` by reason of The percolator 4 is provided with a perfodirect contact of boiling water therewith. rated plate 6 on which the ground coffee Another object is to promote and improve is placed and below said plate ,a strainer 8 70 the circulation of the hot water in the boiler may belocated the same having a handlechamber of the machine, so that said water supporting cross bar 7 by which it may. be may be brought to the boiling point more removed. rlhe bottom of the percolator 4 is quickly than in prior constructions and a perforated at 9 to permit the coffee extract saving in fuel may also be effected. A furto flow down into the extract receptacle 10. to ther object is to provide for drawing off A pipe 12 is connected to the bottom of water from the upper portion of the boiler said receptacle 10 and passes horizontally chamber for use n making tea or other purthrough the walls of the receptacle and outer poses. Other objects will appear as the decasing, being fitted at its outer end with a scription proceeds. nozzle 16 controlled by a valve 15 by means 8o rlhe invention will be first hereinafter deof which the coffee extract may be drawn scribed in connection with the accompanyoff as desired. A gauge tube 13 may be aring drawings, which constitute part of this ranged between the valve 15 and another specification, and then more specifically devalve 14 communicating with the outer casfined in the claims at the end of the deing higher up for showing the level of the 36 scription. extract in the receptacle l0. rlhe bottom of lin the accompanying drawings, wherein the oven or protecting vessel 17 may be similar reference characters are used to dished, as at 18, if desired. designate corresponding parts throughout Below the bottom of the outer casing 1 the several views: of the machine a. cross-shaped water heating 4o Figure 1 is a central vertical section of and circulating device 24 is arranged the a coee urn constructed substantially in Iacsame comprising radially arranged pipes or Q01-dance with this invention, tubes 27 extending horizontally outward Fi re 2 is a horizontal section on the line from a central coupling 25 to T-couplings llll of Figure 1, and 26 at the outer ends of said pipes. Said 95 45 Figure 3 is a detailed vertical section of l"couplings have water-tight connections the lower portion of the boiler chamber and with the bottom of 'the casing 1 as shown water circulating device below the same. at 28 in Figures 2 and 3, while the lower 'llhe coffee machine comprises an outer casends of said 'lV-couplings are stopped by ing 1 of cylindrical shape and fitted with plugs 29. The central coupling 25 is also m0 a removable cover 2; A short distance beconnected through the bottom of thecasing low the upper edge of the casing a ledge 3 1 with an upwardly extending pipe 33 which cracking or breakingsaid earthenware receptacle as might be the case if the hot water came in'contact with the same and the protecting casing or'oven 17 were not provided. rlhe central coupling 25 is also connected by a pipe 30 with a nozzle 32 controlled by a valve 31 by means of which hot water may be drawn from the upper portion of the casing 1 where the upper ends of the branch pipes 35 are arranged at 36, for use in making tea or other purposes. It will be noted that in this way the hottest water, which is in the upper part of the casing 1, may be drawn oli' through the bottom of said casing by reason of the pipe 33 and branch pipes 35 arranged as shown and described.

A pipe 20 is arranged partially in the casing 1 and has a portion 21 arranged outside the same and litted with a valve 22. The lower end of said pipe extends below, the water level in the casi 1 while the upper end thereof enters sai casing at 23 above the ledge 3. Water may be let into the casingthrough a pipe 37 controlled by a valve 38, and may be let out via a capped opening 39.

In operation, when the machine is charged as shown in Figure 1 and the burner 40 below the circulating device 24 is lighted, the cooler water from the bottom of the casing 1 is drawn into said circulating device 24 through the upper open ends 28 of the T-couplings and discharged` through the pipe 33 and branch pipes 35. As soon as the water in the casing l becomes hot enough to 'generate suicient steam pressure, opening of the valve in the' pipe section 2l will result in hot waterbeing forced up through the pipe 20 and pipe section 21 and discharged as indicated by the arrows upon the ground coiee in the percolator 4 where it will extract the essence therefrom in the usual way, said colee extract being collected in the receptacle 10 from which it is drawn via pipe 12 and nozzle 16 as required. The heating of the water in the casing 1 is expedited by the provision of the circulating device 24 and the branched pipe 33, said cross-shaped circulating device being arranged directly over the burner, and said branched pipe reaching up well around the extract receptacle 10 and the oven 17 inclosing it.

I` claim 41. In a coffee machine, the combination ing for the extract receptacle surrounding the same and spaced therefrom for the purpose specified, and a ledge in the upper pol" tion of said boiler on which said percolator, extract receptacle and protecting casing are all supported.

2. In a coffee machine, the combination with a water boiler, of a circulating device arranged below thebottom of said boiler, said circulating device having ports opening through the bottom of the boiler for the intake of water therefrom, and a water discharge pipe leading from said circulating device well up into said boiler.

3. In a coffee machine, the combination with a water boiler, of a cross-shaped circulat-ing device arranged below the bottom of said boiler, said circulating device havving ports at the outer ends of its arms for the intake of water from said boiler,` and a water discharge pipe leading from the center of said circulating device well up into -the boiler for the purpose specified.

4. In a coffee machine, the combination with a water boiler, of a circulating device arranged below the .bottom of said boiler and having intake and discharge passages in communication with the boiler, and a pipe connected to said circulating device for drawing oli' water directly from the same for the purpose specified.

5. In a cofee machine, the combination with a water boiler, of an extract receptacle arranged therein, a circulating device below the bottom of the boiler, said device having intake ports opening through the bottom of the boiler, and a discharge pipe leading from said circulating device into the boiler and terminating adJacent the extract receptacle.

6. In a coffee machine, the combination with a water boiler, of an extract receptacle arranged therein, a circulating device below the bottom of the boiler, said device having intake ports opening through the bottom of the boiler; and a discharge pipe leading from said circulating device into the boiler and terminating therein above the bottom of said extract receptacle.

7. In a coffee machine, the combination with a water boiler, of an extract receptacle arranged therein and having its walls spaced from those of the boiler, a circulating device below the bottom of the boiler and having ports opening through the bottom thereof for the intake of water, and a discharge pipe leading from said circulating device into the boiler and having branches reaching up between the walls of the boiler and extract receptacle for the purpose specified.

. 8. In a coi'ee machine, the combination with a water boiler, of an extract receptacle arranged therein, an air jacket surrounding said receptacle and spaced Jfrom the Walls 0f the casing, a circulating device below the bottom of the boiler and having intake ports opening through the bottom thereof, and

a discharge pipe leading from the circulan ing device into the boiler and terminating between the Walls of`the casing and air l@ jacket for the extract receptacle.

ln testimony whereof, I have signed my name to this specification.

HENRY STROHBACH. 

